处于不确定状态的会话 - 终止/回滚

Question

我有一个 SQLjob，它调用xp_cmdshell用于通过脚本将 txt 文件转储到 ftp 站点。

有时它会失败并且作业被挂在可执行状态。通常我会终止会话并清除它。

但是，我有两个会话处于不确定状态。

 sp_WHO2 53 -- running from 7/8/2018

SP_WHO2 98 -- running from 6/16/2018

作业状态显示它，Runnable但命令是KILLED/ROLLBACK。

检查 SPID 53

Kill 53 with status only 

输出

SPID 53: transaction rollback in progress. Estimated rollback completion: 0%. Estimated time remaining: 0 seconds.

检查 SPID 98

KILL 98 with status only

输出

SPID 98: transaction rollback in progress. Estimated rollback completion: 0%. Estimated time remaining: 0 seconds.

我该如何清除这些会话？

我遇到了 SQL Server 的性能问题，这导致我参加了这些会议。我做了一些研究并指出我相信它会增加日志文件并导致性能问题。我不知道当前问题是否是因为这些会话，但它们是活跃的、昂贵的查询。所以我想从这里开始。我是这里的开发人员，我知道活动监视器在 SQL SERVER 2014 中已过时但我确实检查了活动监视器，下面是图像。

你能建议我怎么做吗？

我确实读过 Brent Ozar 写的关于这种情况的博客
-回滚：当你杀死一个会话时会发生什么？.

艰难地学习，寻找解决根本原因。

AK

Answer 1

You could try to kill the windows process that was spawned with xp_cmdshell as that process is probably running and not handled by killing the spid from SQL Server. The way you describe it I would guess the ftp program is still running.

This is because the kill command doesn't kill programs that were started out of process.

You could simulate the scenario like this:

In a SQL Query window start a process:

xp_cmdshell 'notepad.exe'

and then after killing that spid I get the same output in sp_who2 as you

54      RUNNABLE                        Administrator   hostname      . master  KILLED/ROLLBACK     0   0   07/24 14:23:02  Microsoft SQL Server Management Studio - Query  54      0  

But I still have a running notepad.exe process:

C:\Users\Administrator>tasklist | find "notepad"
notepad.exe                   4676 Services                   0      3 788 K

Once I kill that notepad.exe process my SQL Server spid is gone too.

If you want to find out what process you need to kill process explorer should show it as a child process of sqlserver.exe like this (you might need to start procexp.exe as administrator):